Phd work: Nutrient flux in a closed recirculation system with an integrated water treatment by seaweed-filter - Model and Reality

The subject of this research work is the integration of an seaweed filter into a recirculation system for an intensive fish production. In closed system the accumulation of final products of the fish metabolism, as nitrogen and phosphorus compounds, can lead to toxic conditions. Seaweeds remove part of these nutrients from the water. Thus seaweed filter are suitable for a process water clarifying and improve as usable by-product due to nutrient recycling the sustainability of resources and economy of fish production.

Publications: Wecker, B., Waller, U. 2006. Feasibility of using the oxidation-reduction potential, pH value and molecular nitrogen gas volume for monitoring the performance of a denitrification unit. AQUA 2006 Session "Aquaculture Engineering" May 12, 2006, Florence, Italy  Probst, W.N., Ueberschär, Tan, D., Xiong, M., Rosenthal, H., Wecker, B., Chang, J., Drossou, A., Petereit, C., Yong, G. 2006. Rearing of Procypris rabaudi during early life-history stages. Journal of applied Ichthyology 22(6): 530-535  Wecker, B., Bischoff, A.A., He, J., Kube, N., Lüning, K., Waller, U. 2005. Modelling the nutrient uptake and benefits of seaweed filter integrated in a closed recirculating system. European Aquaculture Society Special Publications 35: 465-466  Bischoff, A.A., Kube, N., Wecker, B., Waller, U. 2005. MARE - Marine artificial recirculated ecosystem: Steps towards closed systems for the production of marine organisms. European Aquaculture Society Special Publications 35: 135-136  Orellana, J., Wecker, B., Sander, M., Waller, U. 2005. Particulate matter in a modern marine recirculation system: What, where, and how much. European Aquaculture Society Special Publications 35  Kube, N., Bischoff, A.A., Wecker, B., Waller, U. 2005. The feasibility of a photobioreactor (Microalgae) for removal of dissolved nutrients in a closed recirculating system. European Aquaculture Society Special Publications 35  Waller, U., Bischoff, A., Orellana, J., Sander, M., Wecker, B. 2003. An advanced technology for clear water aquaculture recirculation systems: Results from a pilot production of Sea bass and hints towards "Zero Discharge". European Aquaculture Society Special Publications No. 33: 356-357  Wecker, B. 2002. Anorganische Stoffflüsse in einer experimentellen Kreislaufanlage mit definiertem Fischbesatz. (Inorganic nutrient fluxes in an experimental recirculation system with a defined fish biomass) Diploma Thesis, University Kiel, 99 pp.